Is the Honeywell TC806D1049 Photoelectric Duct Smoke a 2 wire or a 4 wire?
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The Honeywell TC806D1049 is a 2-wire addressable SLC device (Page 2) [1].
It is powered directly by the signaling loop and does not require the external power connections found on the TC806D1056 relay model (Page 4) [1].
Verify with current documentation before making changes.